public void RemoveField_KeyFieldHasFieldAndGroupOwnsKeyField_RemovesKeyField()
{
var testField = new Field("TestField");
var subGroup = new SubGroup("/");
subGroup.AddKeyField(testField);
Assert.Contains(testField, subGroup.KeyFields);
Assert.Contains(testField, subGroup.Fields);
subGroup.RemoveField(testField);
Assert.DoesNotContain(testField, subGroup.KeyFields);
Assert.DoesNotContain(testField, subGroup.Fields);
}
